Spark arrester



Oct. 25, 1932,

H` G. WEINLAND SPARK ARRESTER Filed Aug. l2, 1929 INVENTOR ATTO RN EYSPatented Oct. 25, 1932 UNITED STATES PATENT OFFICE HERMON G. WEINLAND,OF SPRINGFIELD, OHIO, ASSIGNOR T0 THE SAFETY GRINDING WHEEL & MACHINECOMPANY, OF SPRINGFIELD, OHIO, A CORPORATION OF OHIO SPARK ARRESTERApplication led August 12, 1929. SerialNo. 385,348.

'I his invention relates to spark arresters, it more particularlyrelating to spark arresters for grinding machines and especially togrinding machines of the portable type, although not necessarily limitedto that particular type of machine.

The object of my invention is to provide a spark arrester which will befire-proof and unbreakable with ordinary usage, and also one which willnot interfere with the necessary movements of the machine to which it isapplied.

In the accompanying drawing:

Fig. l is a side elevation of a. grinding machine to which my improvedspark arrester has been applied.

Fig. 2 is an enlarged side elevation of the sparkarrester, showing insection that portion of the grinding machine to which it is attached.

I ig. 3 is an end elevation of the parts shown in Fig. 2.

Referring to the drawing, in the present case the machine to which myimproved spark arrester is shown applied is a grinding machine of theportable type. The machine has a tubular frame member l suspended from-a freely 'movable rod 2 by a hanger 3. At one end of the support l ismounted in any usual and well known manner a grinding wheel 4. rlheother end of the support l has a head 5 from which is suspended anelectric motor 6, power being applied to the grinding wheel from themotor through a belt and pulleys which are not shown in the presentcase. The

grinding wheel is revolved in the direction of the arrow in Fig. l sothat the sparks from the wheel are projected rearwardly. These hotsparks, which are in the form of hot metallic particles, unlessarrested, accumulate upon the rear portion of the machine.

My improved spark arrester consists of a curtain of flexible metalliccharacter shown in the present case in the form of metallic chains.There is provided a thin elongated head 7 to each side of the lower edgeof which are attached a series of flexible metallic chains 8 which hangdownwardly to provide the curtain. The head is preferably of sheet metaland the preferred manner of attaching the chains to the head is bywelding. The sheet metal head has an integral upwardly extending shank 9which is attached by rivets or otherwise to a depending ear 10 on thelower member of a clamping collar 1l. The clamping collar is clamped tothe tubular support l so that the curtain formed by the chains 8 hangsin the path of the sparks.

By this construction a spark arrester is provided which will not beaffected by the heat of' the sparks and which will not be broken norbent by contact with the work or other objects when the machine is movedfrom one position of operation to another and is therefore not subjectto the objections of other forms of spark arresters, such as leatherwhich burns, asbestos which breaks, and sheet metal which bends andbreaks.

Having thus described my invention, I claim:

l. In a spark arrester, a head, a series of closely placed metallicchains depending from said head Ito form a curtain impervious to sparks,a clamping collar, and means for securing said head to said clampingcollar.

2. In a spark arrester, an elongated sheet metal head having an integralshank, a series of closely placed metallic chains secured to anddepending from said head to form a curtain impervious to sparks, atwo-part clamping collar, one member of which has an ear, and means forsecuring said shank to said ear.

3. In a spark arrester for a grinding machine which has a freelysuspended support, a grinding wheel at one end of said suppont and amotor at the other end of said support, of a series of closely placeddepending metallic chains to form acurtain impervious to sparks,together with means for suspending said chains from the grinding wheelsupport in the path of sparks from said grinding wheel.

In testimony whereof, I have hereunto set my hand this 7th day ofAugust, 1929.

HERMON G. WEINLAND.

